import urllib.parse
from datetime import datetime, timedelta
import httpx
from providers.base_provider import BaseProvider
from models.m import User

class WechatProvider(BaseProvider):
    """微信登录提供者"""
    
    async def get_authorization_url(self) -> str:
        """获取微信授权URL"""
        params = {
            "appid": self.config["appid"],
            "redirect_uri": self.config["redirect_uri"],
            "response_type": "code",
            "scope": "snsapi_userinfo",
            "state": "STATE"
        }
        
        authorize_url = self.config["authorize_url"]
        query_string = urllib.parse.urlencode(params)
        return f"{authorize_url}?{query_string}"
    
    async def exchange_code_for_token(self, code: str) -> dict:
        """用微信授权码换取访问令牌"""
        token_url = self.config["token_url"]
        
        params = {
            "appid": self.config["appid"],
            "secret": self.config["secret"],
            "code": code,
            "grant_type": "authorization_code"
        }
        
        try:
            async with httpx.AsyncClient() as client:
                response = await client.get(token_url, params=params, timeout=10.0)
                return {
                    "status_code": response.status_code,
                    "data": response.json() if response.content else {},
                    "text": response.text
                }
        except Exception as e:
            return {
                "status_code": 500,
                "data": {},
                "text": f"请求异常: {str(e)}"
            }
    
    async def get_user_info(self, access_token: str) -> dict:
        """获取微信用户信息"""
        # 注意：这里需要先通过access_token和openid获取用户信息
        userinfo_url = self.config["userinfo_url"]
        
        params = {
            "access_token": access_token,
            "openid": ""  # 实际使用时需要从token响应中获取openid
        }
        
        try:
            async with httpx.AsyncClient() as client:
                response = await client.get(userinfo_url, params=params, timeout=10.0)
                return response.json()
        except Exception as e:
            return {"error": f"获取用户信息异常: {str(e)}"}
    
    async def save_user_info(self, user_info: dict, token_info: dict) -> User:
        """保存微信用户信息到数据库"""
        # 这里应该实现微信用户信息的保存逻辑
        # 由于是示例，我们只返回一个空的User对象
        return User()